Valved injector nozzle



July 29, 1958 y P. J. MARTIN` 2,845,301

vALvED INJECTOR NozzLE Filed Oct. 10, 1956 n.0 l ful/L J. Amer/N BY f//S .4free/Vey United States Patent hice 2,845,301 Patent@` July 2a, A1958 VALVED; INJECTORr NOZZLE..

Paul IrMartln, Chesterton, Ind. Application Gctober 10,195,6,-Serial No. 615,123

z claims. (C1-,.z99-s9) T his/ inventionyrelates to a valved injector nozzle for injecting steam into the vuptakefelbow of a cokingoven gas oiftake to induce a draft for exhausting smoke and amefduring periods in which, for example, the coking oven is beingcharged with coal.

Moreparticularly lit is directedv to improvements in a steamyinjector nozzle of the v.type shown in United States Patent No. 2,343,034,1issued February 29,v 1944,v to Fred A. Weber. As described in greater detail in this patent, such nozzles are permanently mounted in the uptake elbows of cokingrovens .and respectively have a steam injecting orifice which is closed by a stem-actuated plunger toy prevent its becominglpluggedwith carbon during a carburizing operation vof the coke `oven when a steam induced -drafteis ,not required forl removal of by-product gas. While vsuch nozzles. .have proved eminently satisf factory for ,thepurposes described in the patent, operational disadvantages .havedeveloped ,inuse by reason of the fact that ashut-o valveis required in theline sup-., p1yingstea rn; to the r.nozzle which must be.,closed beforethe nozzle closure-plunger canbe inserted and retained in thenozzleforiee sincethe plungerV will move out of thelorilicemunder the pressure ofA steamif itis in-v serted ibeforeclosurefof thesteam valve. With this arrangement.,v operators -frequently .neglect to actuate the nozzle plunger fto.- closed. -position after closing the steam valveand, insuch'fcase, carbon cloggage of the nozzle oricewill` occur during thecarburizing, operation. Althoughsuch.cloggage can be cleared by ramming the closure plunger into.V the ,A nozzle Iorilice, the vforce -required for this, purpose visof a nature.- which: mayI damage the nozzle and f render .it inoperative.

One -of theJ principal Aobjects of this invention. is .to provide a steam` injector nozzle'. whicheliminates the necessityofthe ,steam-linevalve in thepatented.'arrangement describedgenerally abdover--and thus. eliminates nozzle orifice cloggage incident to .operatorneglect Ayfurther and related object is to provide a nozzle of this character with' a .steam valve-.and,.1a.closure plunger whichvis -in. serted inthe nozzle..oritce..in..response to. operation of thestearn valvettolclosedvposition.. Anotherobject .is to provide the nozzle .with .a;1ever for simultaneously actuating the steamvvalve.andprice plunger andwhich indicates by fits position Whether the .-steamvalve Yisin open orl closed, position.

Other objectsandyadvantages of theinvention. will become apparentfrom` the following description. Inthe drawings, there .ist shown a preferred embodiment .of lthe invention. In `this showing:

Figure-1 'is a diagrammatic sectional view showing the manner in-which= the .injector nozzle of this invention is applied=tothe uptake elbow of acoking oven gas olftake;

Figure, 2Y is an enlargedfaandzdetailed'longitudinalsectional view of the,.valved nozzle shownin Figure 1;

Figure 3 is an end view looking from `theleft of ,Figure 2 but showing the operating leverin the position in which it is-shown in- Figure `l; Yand Figure 4 is an, endy view of amounting 4yoke which is used in the assembly shown in Figures 2 and 3.

Figure 1; of Vthe diiglyvingsA illustratedqthe conventional mennerfinrwhieh. the vertisaltsastoitake 1 Uffa Cokieg Oven istcgneCtedwitli. a.. saacelleting main-.2-.by. an

uptake elbow 3. An injector nozzle, designated las a whole by the numeral 4, is permanently mounted in the lower end 5 of the elbow 3 in an `angularly inclined posi: tion `as shown in the drawings for injecting ksteam to in. duce a draft for exhausting smoke land flame lfrom the. oltake v1 as rdescribed in the above mentionedrWeber patent. Generally stated, the nozzle is operated to ,in-4 ject steamrinto the uptake elbow l3 during periods whenV thecoking oven connected to the oiftake 1 is being charged with coal and, during other periods in the coking oven operation, a steam orifice in the nozzle 4 is vclosed by stem actuated plunger in a manner to be described. The structure of the nozzle 4 andvyits manner of operation thus far described are the same as set forth in the Weber1 patent and form no part per se of this invention.

As best shownin Figure 2, the valved injector nozzle 4 vof this invention comprises a housing which is conf structed to define an opening 7 which extends between'y opposite ends thereof and in whichan operating stem 8 is mounted for axial movement in a manner to be described. The housing 6 is comprised of a cylindrical.

valve housing 9.and a cylindrical nozzle llfwhich 'hasj a threaded connection at 11 to `the valve` housing 9. AThe nozzle 10 is restricted at its outer endto provide a nozzle orifice. 12 `and has aA cylindrical. opening 13a of larger, diameter extending inwardly from the orice 12 whichV forms a passage through whichsteam .flows to such.

orifice. The valve housing 9 defines a cylindrical valve chamber 14 and has a laterally extendingthreaded open-` ingl1`5 for connection to a st e/amfline` (not shown) vand through which steam is admittedto the chamber v14. The orifice ,12, steam passage 13 and chamber 14g are axially aligned with each other and respectively formtpart of the axiallyv extending opening 7.referred to above.

A `taperedvalve 16 in Vthe chamber 14 is formedv on the stem 8.at a pointlintermediate the endsfthereof for` seating engagement with an annular tapered valve seat 17 on the nozzle 10 at the innerend of its passage 13 andv which faclesiin an axial `directiontoward the valve chamber 14 and the valve 16. t Ayspring 18 in the valve chamber`14-bears against the valve 16 and provides a bias for movement of the stem 3 in an axial direction toV the right as viewed in Figure 2 tofa closed position in. which the valve16shras seating engagement with the valve seat 17. In this closed position of ,the `valve 16, the steamE chamber Meis disconnected with respect tothe steam How ypassagel?) ,to linterrupt the ow ofstearn` to theloricelZ. i

The, end `portion 20 of thevstem 8 which projects into the passage 1.3 has a diameter less than 4the diameter. of the passage 13 so that it is ineffective to interfere with the ow of steam therethrough. It has a cylindrical plunger`21 on its outer end which isadapted to have Va snug slide fit in the `o rilice 12 and a length such that the plunger V21 moves 4into the orifice 12 when the valve .16 is moved to its closed position engaging the valve seat 17. A pluralitylof lugs 22 project outwardly from the stem portion 20 and have sliding engagementen/,ith the internal surface of the passage 13 to guide theaxial movement of the stem therein and to maintain it in a position of axial alignment in the opening 7.

The, other end portionl 23 of the stem.8 has a slide fit in the portion of the opening '7.which is .formed in a threaded collar 24 of reduced dimension which projects axially outwardly at one end'of the valvev housing 9. A seal yagainst leakage of steam from the .chamber 14 is provided by sealing rings 25 which are held in position by a nut 26 threaded on the end -of the collar 24.- The end portion 230i theA stem 8 projects axially outwardly from the nut 26 to provide` an operating part 27 for controlling theaxial movementof the .stem 8 in theopeningj.

Axial movement of the stem 8 in the opening 7 is controlled by a manually operable lever 28 which is connected with the operating part 27 and is mounted for rotational movement between the two angular operating positions which are spaced 180 apart as respectively shown in Figures 1 and 2. In the position of the lever 28 shown in Figure 2, the stem 8 has `been actuated to the left against the biasing action of the spring 18 to move the valve 16 to open position and to withdraw the plunger 21 from the orice 12 as illustrated. In the position of the lever 28 shown in Figures l and 3, `the stem 8 is released for movement by its biasing spring 18 to the right as viewed in Figure 2 to its closed position in which the valve 16 is seated against the valve seat 17 and disconnects the valve chamber 14 from the ow passage 13 and in which the plunger 21 forms a closure for the orice 12.

The mounting for the operating lever 28 on the valve housing 9 includes a yoke 29 which is comprised of a base plate 30, a cam plate 31, and a bridging member 32 connecting the plates 30 and 31 in axially spaced relation. The bridging member 32 is formed integrally with the cam plate 31, as shown in Figure 2, and has a welded connection to the base plate 30. As shown in Figure 4, the base plate 30 has a bifurcated construction to provide a pair of laterally spaced arms 33 which in the assembled position shown in Figure 2, straddle the inner end of the valve housing collar 24. A nut 34 threaded on the collar 24 has clamping engagement with the base plate 30 and its arms 33 to mount the yoke 29 on the housing 6. As shown in Figure 4, the cam plate 31 also has a bifurcated construction to provide a pair of laterally spaced arms 35 defining an opening 36 through which the operating part 27 of the stem 8 projects when the yoke 32 is in the assembled position shown in Figure 2. A wear plate 37 is fastened to the cam plate 31 to provide a cam ming surface 38 which extends transversely of the operating part 27.

The inner end of the lever 28 is bifurcated to provide a pair of laterally spaced cams 39. As shown in Figure 2, each of the cams 39 has a semi-circular camming surface 40 at its outer end and stop surfaces 41 and 42 along its side edges which are parallel to the lever 28. A pivot pin 43 extending through aligned openings in the cams 39 and the operating part 27 completes the rotatable connection of the lever 28 with the operating part 27 and its mounting on the valve housing 9. The axis of the pin 43 is parallel to the axis of the cam surfaces 40 but has an eccentric location with respect thereto such that it is positioned closer to the stop surface 42 than to the stop surface 41. The differences in the distances between the axis of the pin 43 and the stop surfaces 41 and 42 control the amount of opening movement imparted to the stem 8 upon rotation of the lever 28 between the positions' shown in Figures 1 and 2.

In operation, rotation of the lever 28 to the position shown in Figure 2 is effective to open the valve 16 and clear the plunger 21 from the orifice 12. As the lever 28 is rotated to this position, the cam surfaces 40 slide over the cam surface 38 and the stem 8 is cammed outwardly against the action of its biasing spring 18. Final movement of the lever 28 into the position shown in Figure 2 causes the stop surfaces 41 to move into engagement with the cam surface 38 in such manner that the tension on the biasing spring 18 is effective to hold the lever 28 against movement out of this operating position. Return movement of the lever 28 to the position shown in Figures'l and 3 results in movement of the stop surfaces 42 into engagement with the cam surface 38 and renders the spring 18 effective to move the stem 8 axially in the nozzle opening 7 to a position in which the valve 16 has seated engagement with the valve seat 17 and interrupts the ow4 of steam to the passage 13 and nozzle 12, and in which the plunger 21 is received in and forms a closure for the nozzle orice 12. In this position, the spring 18 is of course effective to `resist movement kof theoperating lever 28 out of the operating position shown in Figures 1 and 3. By reason of the fact that the operating lever 28 has two operating positions which are spaced apart by an angle of it will be apparent that it furnishes an indication to the operator of the operating condition of the injector nozzle. Attention is also directed to the fact that the specific arrangement of lever 28 and yoke 32 is effective to prevent heating of the lever 28 by the operating parts of the nozzle so that it can be operated by an operator without injury by burning.

While one embodiment of my invention has been shown and described it will be apparent that other adaptations and modifications may be made Without departing from the scope of the following claims.

I claim:

l. A valved injector nozzle comprising a housing having an axially extending opening which includes a valve chamber and a ow passage in adjoining relation, one end of said opening being restricted to provide a nozzle orice at the outer end of said flow passage, an annular valve seat at the junction of said passage and chamber and facing in an axial direction toward said chamber, a valve in said chamber for engagement with said valve seat to disconnect said ow passage with respect to said chamber, an operating stem extending through said housing opening and movable axially with respect thereto, said valve being mounted on said stem at a point intermediate its ends for movement thereby to and from a position in seating engagement with said valve seat, a spring in said chamber biasing the movement of said valve and stem to a closed position in which said valve is engaged with said valve seat, a clean-out plunger on one end of said stem received in said orifice with a snug slide tit when said valve is in its seated position, the other end of said stem projecting outwardly from said housing at the outer end of said chamber and providing an operating part, and means for manually actuating said operating part to move said stem and valve axially from said position against the action of said biasing spring to unseat said valve and withdraw said plunger from said orifice.

2. A valved injector nozzle comprising a housing having an axially extending opening which includes a valve chamber and a flow passage in adjoining relation, one end of said opening being restricted to provide a nozzle orifice at the outer end of said flow passage, an annular valve seat at the junction of said passage and chamber and facing. in an axial direction toward said chamber, a valve in said chamber for engagement with said valve seat to disconnect said flow passage with respect to said chamber, an operating stem extending through said housing opening and movable axially with respect thereto, said valve being mounted on said stem at a point intermediate its ends for movement thereby to and from a position in seating engagement with said valve seat, a spring in said chamber biasing the movement of said valve and stem to a closed position in which said valve is engaged with said valve seat, a clean-out plunger on one end of said stem received in said orifice with a snug slide tit when said valve is in its seated position, the other end of said stem projecting outwardly from said housing at the outer end of said chamber and providing an operating part for moving said stem and valve against the action of said biasing spring, and means for actuating said part comprising a pivot pin extending transversely of and connected with said operating part, a semi-circular cam having an eccentric connection with said pin for rotation through an angle of 180, and a lever for manually rotating said cam.

References Cited in the file of this patent UNITED STATES PATENTS 1,201,149 Collinge Oct. 10, 1916 1,661,150 Birkenmaier Feb. 28, 1928 2,343,034 Weber I Feb. 29, 1944 

